Bayer Leverkusen chief Simon Rolfes is coy over their interest in Arsenal midfielder Granit Xhaka.
With a year to run on his Gunners deal, Xhaka has emerged as a summer target for Bayer.
Rolfes said, "There are always rumours. We are looking around the market, but I will not comment on that.
"We want to fundamentally improve our team. There will be a change, we want to create new stimuli."
It's suggested Bayer hope to do business with Arsenal for around 15m.